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Pathogens & Disease


Disease: A disease is a disorder of a tissue, organ or system of an organ; as a result,
symptoms are evident

Pathogen: A micro-organism that can infect a host organism and cause disease

Interface: Where internal and an external environment meet

Endemic: A disease always found within…

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Skin

Defences
Skin - Produces keratin which forms a barrier
Tears & Saliva - Contains Lysosome which kill micro-organisms
Stomach Acid - Kills ingested pathogens
Cilia & Mucus ­ Mucus traps inhaled pathogens, the Cilia pushes them up the
oesophagus
Blood ­ Contains clotting agents and white blood cells attack…

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